KR102140511B1 - Artificial leather having suede touch and manufactruing method of the same - Google Patents

Abstract

The artificial leather manufacturing method according to an embodiment of the present invention comprises the steps of coating a skin layer on a release paper on which a plurality of fine embosses are printed, coating a binder on the skin layer, and backing cloth on the binder. It includes the step of bonding, and removing the release paper.

Description

Artificial leather with suede texture and its manufacturing method {ARTIFICIAL LEATHER HAVING SUEDE TOUCH AND MANUFACTRUING METHOD OF THE SAME}

The present invention relates to a method for manufacturing an artificial leather having suede texture and an artificial leather produced by the same, and more particularly, to a method for manufacturing an artificial leather having a suede texture and a method for manufacturing the same, wherein the fine emboss is transferred to a polyurethane resin .

In general, since ancient times, natural leather has been used as an indispensable product for humans. However, because the resources of natural leather are limited, the demand cannot be sufficiently satisfied, and the supply and demand is gradually decreasing due to various environmental problems and the spread of animal protection movements started in Europe.

And in order to find alternatives to natural leather, many synthetic and synthetic leathers such as nylon leather, polyvinyl chloride leather (PVC leather), and polyurethane dry leather (PU Dry type Leather) have been developed, but the physical strength as natural leather, Quality is significantly reduced compared to structure, performance, and appearance.

In general, a method of manufacturing artificial leather using a non-woven fabric is a non-woven fabric made of mixed fibers made of nylon-polystyrene (PS), polyethylene terephthalate (PET)-polystyrene (PS), etc. Knife coating of a polyurethane solution melted with a water-soluble solvent on the nonwoven fabric serving as the bottom portion forms a silver surface layer that becomes the fleshy part of the leather, and polyurethane (PU) is applied to release paper separately with a leather pattern. A sheet is formed by coating a solution, and the sheet is bonded onto the silver surface layer by a transfer method, followed by solidification of a polyurethane (PU) solution in water, washing with water, removal of release paper, and drying, where a leather-patterned film is formed on the surface. In the lower portion, an artificial leather in which a hexahedral layer and a fibrous layer of the leather in which the transfer layer and the silver layer are combined are sequentially stacked is completed.

However, the artificial leather according to the prior art manufactured in the above-described manner has a problem that the leather itself is not soft and the quality is deteriorated due to a stiff feeling, and it is difficult to mass-produce.

One aspect of the present invention is to provide a synthetic leather and a method of manufacturing the same, which can feel the suede texture with brushed and soft touch by transferring micro emboss on the surface of polyurethane.

Another aspect of the present invention is to coat the skin layer of the water-based urethane resin on the release paper on which the fine emboss is printed, and mass transfer is possible by transferring the fine emboss in a manner of removing the release paper, and artificial leather that can be implemented for a vehicle and its It is to provide a manufacturing method.

The artificial leather manufacturing method according to an embodiment of the present invention comprises the steps of coating a skin layer on a release paper printed with a plurality of fine embosses, coating a binder on the skin layer, and backing cloth on the binder. It includes the step of bonding, and removing the release paper.

In addition, the artificial leather manufacturing method further includes a drying step of drying the skin layer, the binder, and the backing cloth after the step of bonding the backing cloth to the binder.

In addition, in the artificial leather manufacturing method, the drying step is performed for 24 hours at 70 degrees to 90 degrees.

In addition, in the artificial leather manufacturing method, after the step of removing the release paper may further include the step of forming a coating layer on the skin layer on which the fine emboss is formed.

In addition, in the method of manufacturing the artificial leather, the size of one of the fine embosses is 40-50 μm (micrometers), and is coated on one side of the release paper.

Artificial leather according to an embodiment of the present invention, an emboss layer formed with a plurality of fine embosses, a skin layer coated on one surface of the emboss layer, a binder layer coated on the other surface of the skin layer, and the binder layer adhered And a backing cloth layer.

In addition, in the artificial leather, the size of one of the fine embosses may be 40 to 50 μm.

In addition, in the artificial leather, the skin layer may include 40 to 80% of aqueous polyurethane, 1 to 5% of crosslinking agent, 8 to 12% of wax and matting agent, 3 to 7% of thickener and 0.5 to 2% of wetting agent. .

In addition, in the artificial leather, the binder may include 40 to 85% of an aqueous polyurethane, a crosslinking agent, 1 to 5%, a thickening agent 3 to 7%, a wetting agent 0.5 to 2%, and a foaming agent 2 to 4%.

Details of other embodiments are included in the detailed description and drawings.

According to the present invention, by transferring the micro-emboss on the surface of the polyurethane, it is possible to feel the suede texture with a soft touch such as brushing, and it is possible to mass-produce and maintain the robustness. Can get

It will be fully understood that embodiments of the technical idea of the present invention can provide various effects not specifically mentioned.

1 is a flow chart schematically showing a method of manufacturing a synthetic leather manufacturing method according to an embodiment of the present invention.
Figure 2 is a flow chart schematically showing a manufacturing method of the artificial leather manufacturing method according to another embodiment of the present invention.
3 is a schematic configuration diagram of an artificial leather according to an embodiment of the present invention.
Figure 4 is a schematic surface and cross-sectional SEM photograph of the artificial leather according to the first embodiment of the present invention.
5 is a schematic surface and cross-sectional SEM photograph of the artificial leather according to the second embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed contents are thorough and complete and that the spirit of the present invention is sufficiently conveyed to those skilled in the art.

The terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, terms such as “include” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart schematically showing a method for manufacturing artificial leather according to an embodiment of the present invention.

As shown, artificial leather manufacturing method (S1000) is a skin layer coating step (S1100), a binder coating step (S1200), a backing cloth (Backing cloth) adhesion step (S1300) on the release paper printed with fine emboss, It includes a release paper removing step (S1400).

More specifically, the step of coating the skin layer on the release paper on which the fine emboss is printed (S1100) is a step of coating the skin layer of the urethane resin on the PET, which is a release paper on which the plurality of fine emboss is printed.

In addition, PET can print embosses of various patterns as well as fine embossing compared to conventional paper release paper. Accordingly, diversity of the embossed pattern is secured.

In addition, the skin layer contains 40 to 80% of aqueous polyurethane (PUD: Polyurethane Dispersions), 1 to 5% of crosslinking agent, wax, 8 to 12% of matting agent, 3 to 7% of thickener, and 0.5 to 2% of wetting agent. Can be achieved.

And the size of one embo can be made of 40 ~ 50㎛ (micrometer).

Next, the binder coating step (S1200) is a step of coating the binder layer of the urethane resin on the skin layer.

In addition, the binder layer may include 40 to 85% of aqueous polyurethane (PUD: Polyurethane Dispersions), 1 to 5% of crosslinking agent, 3 to 7% of thickener, 0.5 to 2% of wetting agent, and 2 to 4% of blowing agent.

Next, the backing cloth bonding step (S1300) is a step of bonding a binder layer to a fabric or knitted type backing cloth.

Next, the removing paper removing step (S1400) is a step of separating the PET, which is a barriage, from the skin layer and the binder layer adhered to the backing cloth.

As described above, the artificial leather manufacturing method according to an embodiment of the present invention can be implemented as a synthetic leather manufacturing method that can obtain a suede feeling through the coating and transfer of a fine emboss, and is capable of mass production. Robustness can be maintained and implemented as a vehicle seat.

2 is a flowchart schematically showing a method of manufacturing a synthetic leather manufacturing method according to another embodiment of the present invention.

As illustrated, the artificial leather manufacturing method further comprises a drying process and a top coating process as compared to the artificial leather manufacturing method shown in FIG. 1.

More specifically, the method of manufacturing artificial leather is a skin layer coating step (S2100), a binder coating step (S2200), a backing cloth adhesion step (S2300), a drying step (S2400), and a peeling paper removal on the release paper on which the fine emboss is printed. It includes a step (S2500) and a top surface coating step (2600).

And the skin layer coating step (S2100) on a plurality of fine embossed release paper is a step of coating the skin layer of the urethane resin on the PET printed with the fine emboss.

In addition, the size of one embo may be 40-50 μm.

Next, the binder coating step (S2200) is a step of coating a binder layer of urethane resin on the skin layer. Further, the binder layer contains a blowing agent.

Next, a backing cloth adhesion step (S2300) is a step of bonding a binder layer to a fabric or knitted type backing cloth.

Next, the drying step (S2400) is a step of drying the skin layer, the provider, and the backing cloth after the adhesion step (S2300), thereby improving the bonding strength.

And the drying step (S2400) may be implemented by drying for 24 hours at 70 degrees to 90 degrees.

Next, the release paper removing step (S2500) is a step of separating the release paper PET from the skin layer and the binder layer adhered to the backing cloth.

Next, the upper surface coating step 2600 is a step of forming a coating layer on the skin layer on which the fine emboss is formed. Accordingly, the fine emboss can be maintained more firmly.

3 is a schematic configuration diagram of an artificial leather according to an embodiment of the present invention.

As illustrated, the artificial leather 100 includes an emboss layer 110, a skin layer 120, a binder layer 130, and a backing cloth layer 140.

More specifically, the artificial leather 100 is made of a structure in which a binder layer 130, a skin layer 120, and an emboss layer 110 are sequentially stacked on a backing cloth layer 140.

In addition, the emboss layer 110 is formed of a plurality of fine embossed, the size of the fine emboss may be made of 40 ~ 50㎛.

And the skin layer 120 may be made of an aqueous urethane resin. In addition, the skin layer 120 is water-based polyurethane (PUD: Polyurethane Dispersions) 40 ~ 80%, crosslinking agent 1 ~ 5%, wax (Wax), matting agent 8 ~ 12%, thickener 3 ~ 7%, wetting agent 0.5 ~ 2 %.

In addition, the skin layer 120 may be formed of two layers.

In addition, the binder layer 130 may be made of an aqueous urethane resin. In addition, the binder layer 130 may be made of 40 to 85% of aqueous polyurethane (PUD: Polyurethane Dispersions), 1 to 5% of crosslinking agent, 3 to 7% of thickener, 0.5 to 2% of wetting agent, and 2 to 4% of blowing agent. have.

In addition, the backing cloth layer 140 may be made by impregnating or weaving polyurethane with a microfiber nonwoven fabric, and may be made of a fabric or a knitted fabric.

4 is a schematic surface and cross-sectional SEM photograph of the artificial leather according to the first embodiment of the present invention, and FIG. 5 is a schematic surface and cross-section SEM photograph of the artificial leather according to the second embodiment of the present invention.

More specifically, Figure 4 (a) is a schematic surface SEM photograph of the artificial leather according to the first embodiment, Figure 4 (b) is a schematic cross-sectional SEM photograph of the artificial leather according to the first embodiment.

In addition, Figure 5 (a) is a schematic surface SEM picture of the artificial leather according to the second embodiment, Figure 5 (b) is a schematic cross-sectional SEM picture of the artificial leather according to the second embodiment.

As shown, the artificial leather according to the present invention can obtain a desired suede texture by varying the fine patterns to be printed.

The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but those of ordinary skill in the art to which the present invention pertains may use the present invention in other specific forms without changing its technical spirit or essential features. It will be understood that it can be practiced. Therefore, it should be understood that the embodiment described above is illustrative in all respects and not limiting.

100: the artificial leather 110: embossed layer
120: skin layer 130: binder layer
140: backing layer

Claims (9)

delete delete delete delete delete An emboss layer on which a plurality of fine embosses are formed;
A skin layer on which the emboss layer is coated;
A binder layer coated on the other side of the skin layer; And
A backing cloth layer to which the binder layer is adhered,
The size of the fine emboss is made of 40 ~ 50㎛,
The skin layer
40~80% of aqueous polyurethane, 1~5% of crosslinking agent, 8~12% of wax and matting agent, 3~7% of thickener and 0.5~2% of wetting agent,
The binder
40~85% of aqueous polyurethane, crosslinking agent, 1~5%, thickener 3~7%, wetting agent 0.5~2%, and foaming agent 2~4%
Leatherette.
delete delete delete

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